Determination of self-association equilibrium constants of ethanol by FTIR spectroscopy

被引：40

作者：

Schwager, F ^{[1
]}

Marand, E ^{[1
]}

Davis, RM ^{[1
]}

机构：

[1] VIRGINIA POLYTECH INST & STATE UNIV, DEPT CHEM ENGN, BLACKSBURG, VA 24060 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1996年 / 100卷 / 50期

关键词：

D O I：

10.1021/jp9613448

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The self-association of ethanol diluted in CCl4 has been studied by IR spectroscopy, Three OH stretching bands were assigned to monomers, linear dimers, and linear multimers. The self-association was described with two equilibrium constants, one for the formation of dimers, K-2, the other for the formation of multimers, K-A. These equilibrium constants were determined for ethanol concentration ranging from 0.19 to 0.76 mol L(-1) by using a method developed by Coggeshall and Saier. At T = 25 degrees C, K-2 was found to be equal to 1.08 L mol(-1) in terms of molar concentration or 18.3 in terms of molar fraction; K-A was found to be equal to 3.52 L mol(-1) in terms of molar concentration or 60.0 in terms of molar fraction. The enthalpy of formation for K-2 was found to be equal to -4.61 kcal mol(-1) and to -4.15 kcal mol-l for K-A.

引用

页码：19268 / 19272

页数：5